As always, binaries are available for Windows, Mac, and an AppImage for x86-64 Linux (plus distribution specific binaries for a number of Linux flavors including Ubuntu, Debian, Linux Mint, Fedora, and openSUSE).

Linux: A generic AppImage is available for download at the Subsurface GitHub Release page. Download Subsurface-4.8.3-x86_64.AppImage, make it executablechmod +x Subsurface-4.8.3-x86_64.AppImage and then simply run this file.Linux: Ubuntu: Add ppa:subsurface/subsurface to your software sources; the .deb files in that PPA can also be installed on sufficiently current versions Debian and LinuxMint; see the Downloads page and use http://ppa.launchpad.net/subsurface/subsurface/ubuntu to get our latest release version.